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Eyeskey ViewForce-HD 8X42 Binoculars


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● Strong and Lightweight Magnesium-alloy Chassis
● Anti-Reflection Fully Multi-coated Optics
● Phase-Corrected Compact Roof Prisms
● Compact BAK4 Roof Prisms
● Nitrogen Filled and O-ring Sealed


The ViewForce HD combines an ergonomic form factor with well-engineered optical features to give users an ideal device for long-range glassing in challenging light or inclement weather.

Its optical performance starts with phase-corrected BAK4 roof prisms and High-Contrast anti-reflection coatings that produce bright and clear images with accurate color representation. A wide apparent angle of view helps to minimize the distracting hand-shake that is common when holding high-power optics such as this while offering users with an immersive observational experience. For those who want to make detailed observations at close range, the short 6.5ft minimum focus distance allows viewing nearby birds, bugs, flora, and fauna to be comfortable and easy.

Its slim bridge design offers a stable platform for the internal focusing mechanism that is controlled by a slim, low-profile focusing knob. Its lightweight and impact-resistant magnesium alloys chassis is wrapped in a durable rubber armor that offers improved grip security, especially in cold and wet weather; and, the optical tubes are O-ring sealed to keep rain, snow, and mist out. To help minimize fatigue and eliminate vibrations and shake the ViewForce is tripod mountable with an optional adapter.

Optical Performance

  • Moderate 8x magnification brings subjects in close for viewing without sacrificing field of view or exit pupil
  • 42mm objective lenses draw in more light than smaller models to boost low-light performance without excessive bulk
  • Compact roof prism light path
  • BAK4 prisms deliver a round exit pupil and a crisp and clear image with limited edge distortion
  • Phase-corrected prism coatings improve color rendition and contrast
  • High-Contrast Optics system: Optical coatings produce bright high-contrast images with neutral, natural color reproduction
  • Short 6.5-foot minimum focus distance enables detailed observations of bugs, birds, flowers, and other plants at close-range
  • 422-foot field of view at 1000 yards

Use and Handling

  • Closed-bridge configuration provides a stable and strong platform for the focusing mechanism
  • Ribbed and slip-resistant large center focusing wheel is easy to manipulate — even when wearing gloves
  • The right-eye dioptric correction allows for precise compensation to individual eye prescription
  • Long-life twist-up eyecups for comfortable use with or without eyewear
  • Tripod mountable with optional adapter helps to reduce arm-fatigue during long glassing sessions or to eliminate shake and/or vibrations
  • 16.7mm eye relief helps to reduce eye strain and improve viewing comfort during long glassing sessions
  • Comfortable 5.2mm exit pupil will completely cover most pupils as they open and dilate as the light fades

Construction Details

  • Lightweight and durable magnesium chassis reduces weight yet maintains strength and stability
  • Nitrogen-filled and O-ring sealed to be waterproof and submersible to a depth of 3.3' (1m) for up to 30 minutes and resistant to internal fogging when moving through extreme temperature changes and environmental conditions
  • One-piece tethered ocular rainguard protects eyecups from water pooling in them from rain or spraying water when hanging from the neck
  • Weight: 23.63 ounces

Prism Type Roof (BAK4)
Number of Lenses 8 Pieces 6 Groups
Objective Lens Type HD Glass
Prism Coating Phase-correction Coating
Lens Coating Fully Multi-coatings
Eyecup Type Twist-up/down
Chassis Material Magnesium-alloy Chassis
Weight 23.64 oz / 670 g
Magnification 8 X
Objective Lens Diameter 42 mm
Eyepiece Lens Diameter 22 mm
Angle of View 8.0° (Actual)
Field of View 422' @ 1000 yd / 141 m @ 1000 m
Minimum Focus Distance 6.56' / 2 m
Relative Brightness 18.47
Twilight Index 21.19
Exit Pupil Diameter 5.2 mm
Eye Relief 16.7 mm
Diopter Adjustment Yes, Right Eye, ±3
Focus Type Center
Interpupillary Distance 56~74 MM
Fogproof Yes, Nitrogen Filled
Waterproof/b> Yes, O-ring Sealed (1 m /30 min)
Packaging Info
Package Weight 2.4 lb
Box Dimensions (LxWxH) 7.598"x 6.772"x 2.952"
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Eyeskey ViewForce-HD 8X42 Binoculars